We dont crate our 16 week old Boxer. We bought a crate and put him in it the first night we had him, and he cried all night. We tried leaving him in there the next day when we went out for an hour or so, but when we came back we could hear him yelping and whining. Not being one to persevere, we let him have the run of the hallway and kitchen, with our three yo springer spaniel. We have no trouble at night, and have had no trouble for the past 5-6 weeks during the few hours a day they are left together in the house. However, he has just found the hall carpet lifts at the edges and has chewed it. We are now in the process of having the hall floor tiled (with undertile heating), to prevent this problem re-occurring. Yes it is possible he could start on the walls, but bitterbite liquid does seem to stop this. It is difficult to crate a dog, when he can see the older dog running around free, which i think lead to him being disturbed whilst in his crate, as during the day and at night they choose to sleep on the same bed together, and there is no way i would consider crating the older dog as well as he is no problem at all. We are fortunate in the UK, our household insurance covers damage by pets, so I will just have to wait until he gets out of the chewing habit and redecorate!!!